I (John Hasler) wrote:
> As to TDRs, if you can get by without actually seeing pictures of all
> the impedence bumps
> you can get by with a fast counter, a high risetime
> pulse generator, and a couple of fast comparators. Maybe $20 at
> Digikey.
You (Randy Kramer) wrote:
> Can you
On Monday 24 December 2018 15:22:07 Ric Moore wrote:
> On 12/24/18 1:27 PM, Gene Heskett wrote:
> > On Monday 24 December 2018 12:29:53 rhkra...@gmail.com wrote:
> >> On Monday, December 24, 2018 08:39:18 AM Gene Heskett wrote:
> >>> On Monday 24 December 2018 08:18:27 Carl Fink wrote:
> On
On Monday 24 December 2018 14:10:44 rhkra...@gmail.com wrote:
> Hmm, intended to send this to the list, sent to John Hasler, only, who
> did respond -- I hope he will copy his reply to the ist (or tell me it
> is ok to do so).
>
> On Monday, December 24, 2018 08:21:57 AM John Hasler wrote:
> > As
On 12/24/18 1:27 PM, Gene Heskett wrote:
On Monday 24 December 2018 12:29:53 rhkra...@gmail.com wrote:
On Monday, December 24, 2018 08:39:18 AM Gene Heskett wrote:
On Monday 24 December 2018 08:18:27 Carl Fink wrote:
On 12/24/18 7:37 AM, Gene Heskett wrote:
I have a firmware update file kit
rhkramer writes:
> Hmm, intended to send this to the list, sent to John Hasler, only, who
> did respond -- I hope he will copy his reply to the ist (or tell me it
> is ok to do so).
Go ahead.
--
John Hasler
jhas...@newsguy.com
Elmwood, WI USA
Hmm, intended to send this to the list, sent to John Hasler, only, who did
respond -- I hope he will copy his reply to the ist (or tell me it is ok to do
so).
On Monday, December 24, 2018 08:21:57 AM John Hasler wrote:
> As to TDRs, if you can get by without actually seeing pictures of all
>
On Monday 24 December 2018 12:29:53 rhkra...@gmail.com wrote:
> On Monday, December 24, 2018 08:39:18 AM Gene Heskett wrote:
> > On Monday 24 December 2018 08:18:27 Carl Fink wrote:
> > > On 12/24/18 7:37 AM, Gene Heskett wrote:
> > > > I have a firmware update file kit for it, but it requires a
On Monday, December 24, 2018 08:39:18 AM Gene Heskett wrote:
> On Monday 24 December 2018 08:18:27 Carl Fink wrote:
> > On 12/24/18 7:37 AM, Gene Heskett wrote:
> > > I have a firmware update file kit for it, but it requires a dos box
> > > with a usb port. When was the last time you saw one of
Gene Heskett wrote:
> On Sunday 23 December 2018 20:27:37 rhkra...@gmail.com wrote:
>
> > On Sunday, December 23, 2018 07:33:38 PM Doug wrote:
> > > RE: Time Domain Reflectometer:
> > >
> > > Theoretically, you can build your own with a fast pulse generator
> > > and an oscilloscope. The trick
On Monday 24 December 2018 08:57:27 Joe wrote:
> On Mon, 24 Dec 2018 08:09:11 -0500
>
> Gene Heskett wrote:
> > On Monday 24 December 2018 04:26:05 Joe wrote:
> > > There is normally a real Nyquist bandwidth quoted somewhere in the
> > > small print. I used to repair and calibrate Hitachi scopes
On Mon, 24 Dec 2018 08:09:11 -0500
Gene Heskett wrote:
> On Monday 24 December 2018 04:26:05 Joe wrote:
>
> >
> > There is normally a real Nyquist bandwidth quoted somewhere in the
> > small print. I used to repair and calibrate Hitachi scopes for a
> > while, until everyone stopped using
On Monday 24 December 2018 08:21:57 John Hasler wrote:
> Gene writes:
> > In a cnc machine running on stepper motors, the current regulating
> > of the drivers if the grounding is not truly single point, can
> > crosstalk at the regulating frequency, usually well above 20
> > kilohertz, at peak
On Monday 24 December 2018 08:18:27 Carl Fink wrote:
> On 12/24/18 7:37 AM, Gene Heskett wrote:
> > I have a firmware update file kit for it, but it requires a dos box
> > with a usb port. When was the last time you saw one of them? Short
> > answer is never.
>
> Doesn't freeDOS support USB? I
Gene writes:
> In a cnc machine running on stepper motors, the current regulating of
> the drivers if the grounding is not truly single point, can crosstalk
> at the regulating frequency, usually well above 20 kilohertz, at peak
> voltages well over what it takes to destroy an fpga gate as the
>
On 12/24/18 7:37 AM, Gene Heskett wrote:
I have a firmware update file kit for it, but it requires a dos box with
a usb port. When was the last time you saw one of them? Short answer is
never.
Doesn't freeDOS support USB? I know they recommend booting off a USB
drive.
There's a commercial DOS
On Monday 24 December 2018 04:26:05 Joe wrote:
> On Sun, 23 Dec 2018 22:54:20 -0600
>
> John Hasler wrote:
> > rhkramer writes:
> > > Yeah, but I wasn't thinking about actually using a CRT to display
> > > the signal in real time, but, instead, collect samples (at maybe 4
> > > GHz??), store
On Monday 24 December 2018 04:20:45 Joe wrote:
> On Sun, 23 Dec 2018 23:11:35 -0500
>
> Gene Heskett wrote:
> > Thats essentially what our high bandwidth scopes do today, $400 gets
> > you a 1ghz sampler with an effective bandwidth of 200 mhz. I've got
> > one, the nice thing is that because it
On Sunday 23 December 2018 23:54:20 John Hasler wrote:
> rhkramer writes:
> > Yeah, but I wasn't thinking about actually using a CRT to display
> > the signal in real time, but, instead, collect samples (at maybe 4
> > GHz??), store them, and then display them as a static display.
>
> At that
On Sun, 23 Dec 2018 22:54:20 -0600
John Hasler wrote:
> rhkramer writes:
> > Yeah, but I wasn't thinking about actually using a CRT to display
> > the signal in real time, but, instead, collect samples (at maybe 4
> > GHz??), store them, and then display them as a static display.
>
> At that
On Sun, 23 Dec 2018 23:11:35 -0500
Gene Heskett wrote:
> Thats essentially what our high bandwidth scopes do today, $400 gets
> you a 1ghz sampler with an effective bandwidth of 200 mhz. I've got
> one, the nice thing is that because it is digital, a once a second
> glitch in a 42 megabaud
rhkramer writes:
> Yeah, but I wasn't thinking about actually using a CRT to display the
> signal in real time, but, instead, collect samples (at maybe 4 GHz??),
> store them, and then display them as a static display.
At that sort of frequency sampling scopes (including the old crt ones)
sample
On Sunday 23 December 2018 22:20:30 rhkra...@gmail.com wrote:
> On Sunday, December 23, 2018 09:03:15 PM Gene Heskett wrote:
> > On Sunday 23 December 2018 20:27:37 rhkra...@gmail.com wrote:
> > > On Sunday, December 23, 2018 07:33:38 PM Doug wrote:
> > > > RE: Time Domain Reflectometer:
> > > >
On Sunday, December 23, 2018 09:03:15 PM Gene Heskett wrote:
> On Sunday 23 December 2018 20:27:37 rhkra...@gmail.com wrote:
> > On Sunday, December 23, 2018 07:33:38 PM Doug wrote:
> > > RE: Time Domain Reflectometer:
> > >
> > > Theoretically, you can build your own with a fast pulse generator
On Sunday 23 December 2018 20:27:37 rhkra...@gmail.com wrote:
> On Sunday, December 23, 2018 07:33:38 PM Doug wrote:
> > RE: Time Domain Reflectometer:
> >
> > Theoretically, you can build your own with a fast pulse generator
> > and an oscilloscope. The trick is, you need a REALLY FAST
> >
On Sunday, December 23, 2018 07:33:38 PM Doug wrote:
> RE: Time Domain Reflectometer:
>
> Theoretically, you can build your own with a fast pulse generator and an
> oscilloscope. The trick is, you need a REALLY FAST oscilloscope! The
> pulse generator is easy, just a couple of transistors, maybe
25 matches
Mail list logo
